#!coding=utf-8

import asyncio
import time

async def say_after(delay, what):
    await asyncio.sleep(delay)
    print(what)

async def main():
    print(f'start at {time.strftime("%X")}')

    await say_after(1, 'hello')
    await say_after(2, 'world')

    print(f'finish at {time.strftime("%X")}')

asyncio.run(main())